#include <stdio.h>
#include <float.h>

int main(){
    int n;
    double db = 1.0/3.0;
    float  fl = 1.0/3.0;

    printf("FLT_DIG:%d DBL_DIG:%d\n", FLT_DIG, DBL_DIG);
    printf("db:%.6f fl:%.6f\n", db, fl);
    printf("db:%.12f fl:%.12f\n", db, fl);
    printf("db:%.16f fl:%.16f\n", db, fl);

    return 0;
}


